Cross flow nasal swabs were used for the qualitative detection of New Coronavirus antigens in suspected nasopharyngeal and pharynx swabs.
Widely used: applicable to hospitals, CDC, communities, airports, stations, customs, schools, enterprises, etc.
【Sample Requirements】
When collecting sterilized samples, it is recommended to use polyester sponge samples with PP (polypropylene) rods.
(1) Oral pharyngeal sampling method: tilt the head of the sampler slightly, open the mouth, expose the tonsils on both sides, cross the root of the tongue with a cotton swab, and coat the tonsils on both sides. Wipe the side of lecithin at least three times, and then wipe it up and down the posterior pharyngeal wall with a cotton swab at least three times.
(2) Nasopharynx sample collection method: the collector gently holds the collector's head in one hand, holds the swab in the other hand, inserts the swab into the nostril, and slowly stabs it backward along the bottom of the lower nasal tract. As the nasal tract is curved, do not use excessive force to avoid traumatic bleeding. When the top of the swab reaches the posterior wall of the nasopharynx, rotate it slowly once (pause once in case of reflex cough), and then slowly remove the swab.
(3) Sample processing: for the collected samples, it is necessary to process them as soon as possible (if they are not processed immediately, it is necessary to store them in sealed plastic tubes immediately after drying and sterilization). Within 24 hours from 2 ℃ to 8 ℃; Long term storage at - 70 ℃. However, avoid repeated freezing and thawing.
Test Method
Restore all reagents to room temperature before testing. The test needs to be carried out at room temperature.
1. Extract specimens (see Figure 1)
1. Add 400 in the sample extraction tube vertically μ L (about 10 drops) sample buffer, insert the sample into the solution, rotate it about 10 times near the inner wall to dissolve the sample in the solution. probably.
2. Flatten the sample chip along the inner wall of the extraction tube, keep the liquid in the tube as much as possible, take out the sample and discard it.
3. Cover the transmitter.
II. Test Procedure (See Figure 2)
1. Remove the test card from the sealed bag.
2. Put 2 drops (about 80 μ l) The treated sample extract is added to the additional well of the test card and the timer starts.
3. Read the results of the test card after 15 minutes at room temperature. After 20 minutes, the result was invalid.
Interpretation of test results
① Invalid result: the quality management production line (production line C) does not display the reaction production line, and the test is invalid. It is necessary to repeat the experiment.
② Negative result: red ribbon, color of quality management line (line C).
③ Positive result: two red bands, test line (t line) and quality management line (C line) are represented in color.
Company profile
Zhongxiu Science And Technology Co.,Ltd., is a high-tech enterprise engaged in the research and development, production and operation of in vitro diagnostic products. The in vitro diagnostic products developed by the company cover POCT series, microbial series, biochemical series and immune series reagents and supporting instruments.
The company has always adhered to the core concept of "fast and accurate, living up to life", committed to providing society with excellent products and services, and contributing to the cause of human health.
Zhongxiu Qualifications
DOC
